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5 Sets Flush Mounted 3/4" Door Magnetic Contacts Alarm Switch NC (White)

5 Sets Flush Mounted 3/4" Door Magnetic Contacts Alarm Switch NC (White)

$11.52
  • Condition: New
  • Ships from: Anaheim, US
  • Seller: yummam0 (99.6% positive)
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About this item

It can't work alone, needs to connect with alarm systems to received the signal of door states. NC : when door is closed, switch is closed loop, when door is open, switch is open loop. White/black color for choosing, suitable for dark or light color doors/windows.

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